Retransmission requests only add overhead to the channel
when a transmission fails, but the time required to retransmit
may delay other transmissions. Retransmission may also be
unsuccessful for a significant period due to the bursty nature
of interference. A combination of error correction and retransmission
requests can also be implemented. Since interference
is often localised, exploitation of spatial diversity can be
achieved by using multiple, physically separate antennas. In
instances where multiple antennas cannot be implemented,
devices may also attempt to route data through third parties
in the hope that clear channels exist between the third device
and each of the two devices attempting to communicate. More
advanced error mitigation strategies may also be implemented,
such as deadline awareness and increased error correcting
overhead for retransmitted signals.